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USSR Data Telex ← T-205
Electronic telex encryptor
- this page is a stub
T-206, codename WESNA (Russian: Весна), is an electronic online
cipher machine for telegraphy (telex),
introduced around 1974 by the Soviet Union (USSR)
as successor to the T-204 (WOLNA) 1 and T-205 (WECHA)
rotor-based machines [1].
The T-206 was used by all countries of the former
Warsaw Pact for inter-governmental traffic.
In the former DDR (East-Germany), it was approved for all traffic
up to Geheime Verschlußsache (GVS) - the East-German equivalent of
SECRET.
The T-206 MT (WESNA) was a fully electronic — solid state — cipher machine
that was built with thermionic valves (vacuum tubes), semiconductor diodes and
magnetic core memory. Nevertheless, it has the same size as the
earlier T-205 rotor machine. From 1982 onwards, newer
models of the T-206 were introduced, such as the T-206 2MT, 3, 3M
and 3M1. The 3M and 3M1 models even had transistors
and integrated circuits (ICs), and were half the size of the initial
T-206 MT.
The 3M and 3M1 are the only two models that were used in armored
communications vehicles.
➤ More information from Jorg Drobick (off-site)
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The T-204 was assumed to have been compromised in the Six-Day War
(5-10 June 1967) between Israel and some Arab countries (Egypt, Jordan and
Syria). It is believed that the Israelis had captured some T-204 machines,
which enabled them to break the cipher.
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Spare parts, such as sub-circuits and magnetic core memory modules,
were supplied in grey metal containers like the one shown in the image on
the right. For a complete overview of the various magnetic core types
that were used with the T-206, please refer to
Jörg Drobick's excellent website [3].
➤ Magnetic cores (off-site)
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- T-206 MT
- T-206 2MT
- T-206 3
- T-206 3M
- T-206 3M1
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© Crypto Museum. Created: Wednesday 14 September 2011. Last changed: Wednesday, 10 April 2024 - 21:25 CET.
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